Cygnos V2 Atmel 90usb646

[schubi]

im really wondering, why no-one in the world (after searching 15hourrs) thought about using the cygnos2 chip of a x360 to jailbreak a ps3 (with psgroove)

it has a nice Atmel 90usb646 which is supported by psgroove!
and there is a nice long usbcable coming out of the x360 looking desperatly to the ps3 usbports

my x360 has a cygnos v2 built in, JUST for fast nand flashing
the jtag hack is still wired as usually without a cygnos
->so i think i dont really need the cygnos-firmware on the cygnos for normal operation of my x360. (gaming)
->but will i be able to change the firmware back again ? (if cygnos toolbox doesnt want to work, im pretty sure the atmel program for the chip itself will work ) but i dont know...
theres a emergency firmware flash function in the cygnos too but i never needed it and have no idea if that still works with psgroove on the cygnos.
maybe someone has more experience with this function

pretty obviously i will loose the write and read nand function as long as i have psgroove on the firmwareflash, but u dont need that often

one thing im not sure about is technical standards
i dunno if this atmel chip talks 100% the same way(same wiring) to the usbport like a teensy1 board talks (=same chip)
or could everthing be wired in a total other way and my xbox is ****ed after starting once. ?
(i wont find cygnos schematics i could compare with teensy schematics)

if its surly wired the same (at least the important parts for us) it should work without bricking my x360
(since the psgroove-software just uses the usbport for I/O, i cant think of any bad unwanted consequences for my x360 eg. destroying cygnos,nand,whole x360,)

i also hope there is no difference in any way with the voltage

it would be a easy way for the ps3 + 360 owners, just rewire the jtag hack from cygnos to x360 once, and then just conect x360 and ps3.
plus it sure would be the coolest way of enabling homebrew on the ps3, with a homebrew-x360

id be happy to hear of some expert if all my thinking is correct


everyone have a wonderful day

[nilezon]

This would indeed be cool. I have a Xbox with Cygnos next to my PS3

[Ruddicz]

This would indeed be cool. I have a Xbox with Cygnos next to my PS3

The chip is USB updatable. find a teensy schematic and see if the board matches. if so, reset the board to enter DFU mode, and you should be able to load your groove hex.

for fast nand flashing use USB stick and XeLL, works perfect. Update to XeLLous is better - using XeLL!
Power on 360 with eject and ensure USB stick is in the rear port with the correct file on the root (updflash.bin I believe for NAND)
it will boot, find the flash, write it and then prompt to power off. bam. updated.

Anyway, with the cygnos - the board has to be 'wired' correct for teensy. should work, if the crystal is supported.

[schubi]

yea i know the chip is updatable, its exactly the same like teensy1++
atmel90usb646
there comes a "toolbox" software with the cygnos for updating not only nand but also cygnos firmware, dunno if a "custom" firmware will be accepted by the toolbox. didnt need the atmel flash program yet.

im afraid of not beeing able to get the cygnos firmware again in my cygnos and of the de- resoldering process which i cant afford atm. that shits very expensive here, not many shops... plus i have absolutly no experiences with programin microchips and possible problems and how easy or hard it is to destroy a device like that.

im pretty sure the whole usb stuff will work, and i dont remember anything else that the psgroove software does. just lotta USB i/o,(except maybe 1 or 2 LEDs) i dunno if there can be voltage differences between x360cygnosusbport and the ps3usbport i also have few experiences how bad the hardware could be harmed by wrong i/os to wrong components

teensy++ schematics are everywhere, but i didnt find cygnos2 schematics (and there are at least 6 revisions of the chip)

if this method will work, all u have to do is reflashing original cyg firmware to update the rebooter on the nand 3 times a year(which also can be done easily without a cygnos(but its a nice reassurance if something goes wrong,lpt sucks, (hopefully we wont need this usbthing for long, a CFW or anything)

would be cool if someone with experience and knowledge about the low technical stuff could give me a risks-report... or tellls me what im wrong about

let it roll